Which architectural feature was specifically developed by Selfridges department store in London to revolutionize retail customer engagement in the early 1900s?

The architecture of retail spaces has evolved dramatically with changing consumer behaviors and technological advancements. From grand department stores of the early 20th century to today's experiential retail environments, architects have played a crucial role in shaping how we shop. This poll tests your knowledge about how architectural design influences retail strategy and customer engagement in the built environment.

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Glass display windows that allowed merchandise to be viewed from the street
Central atrium with natural lighting to enhance shopping experience
Rooftop gardens where customers could relax between purchases
Multi-level escalators to facilitate movement between departments